Haixia Zhang

Professor, Department of Microelectronics
Peking University, Beijing

Magnetic-controlled 3D Structure and Self-Powered Applications

In the past decades, the development of new material and fabrication process make the electronics engineering bloom. The field of stretchable electronics has been developed rapidly in recent years due to their potential importance in diverse fields. Although the development of functional materials and flexible microsystems has been significantly advanced over the past decade, the precise control of soft structures remains a major challenge for practical applications of energy harvesting, functional sensing and interaction. Magnetic material is an attractive candidate that enables multifunctional devices with capabilities in both sensing and actuation.
In this talk, we show that magnetic materials with temporary magnetization can also achieve programmable, multimodal locomotion through a set of judiciously engineered 3D designs. Such 3D soft structures can exhibit various tethered locomotion under the precise control of magnetic fields, including local deformation, unidirectional tilting and omnidirectional rotation. Applications will focus on energy harvesting systems, including a 3D piezoelectric device for non-contact conversion of mechanical energy and active motion sensing, as well as a 3D magnetic-controlled solar cell that automatically tracks the light through continuous and accurate rotation. The design strategy and resulting magnetic-controlled 3D soft structures hold great promise not only for enhanced energy harvesting, but also for multimodal sensing, robotic interfaces, and biomedical devices through further encapsulation.